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reverse-dns-via-alidns-watch
x402
reverse-dns-via-alidns-watch is a paid API for AI agents from ip.intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-11).
Performs a reverse DNS (PTR) lookup for an IP using AliDNS, then compares the result against the previously stored result to detect changes.
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for reverse dns via alidns: runs the check, compares it with the result from your previous call for the same ip (kept 90 days) and returns the current answer, changed true/false, the fields that changed with before/after values, and when it was last seen. Schedule it to be alerted when this changes. $0.02 per check.
Output
Returns the current PTR record answer from AliDNS, a boolean 'changed' flag, a list of fields that changed with their before and after values, and a timestamp of when the record was last seen. Results are stored for 90 days for comparison.
Example use cases
Server IP hostname drift detection
“Keep an eye on the PTR record for 198.51.100.7 via AliDNS — I want to know immediately if the reverse DNS changes and what the old vs new hostname was.”
Threat intel IP reputation monitoring
“For IP 45.33.32.156, check its reverse DNS through AliDNS right now and compare it to what it was before — flag it if anything changed so I can update my threat feed.”
CDN or cloud provider attribution tracking
“Run a reverse DNS watch on 104.21.0.1 using AliDNS and tell me if the PTR record has flipped — I'm tracking whether this IP moved to a different cloud provider.”
Technical details
Endpoint
GEThttps://ip.intel.rallylive.ca/watch/ip/ptr/via/alidns?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you specifically want to detect changes in reverse DNS (PTR) records using AliDNS as the resolver, and need a historical comparison with before/after diffs rather than just a raw PTR lookup. Prefer this over a plain reverse DNS lookup when your goal is change alerting, drift detection, or audit logging of PTR record mutations over time.
Side effects
- IP not previously checked — no baseline exists so 'changed' will be false on first call
- IP has no PTR record — response returns empty or null PTR answer
- AliDNS resolver unavailable — lookup may time out or return an error
- Malformed IP address input — invalid format may cause a 4xx error
- 90-day retention window exceeded — previous result purged, treated as first-time check
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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